Twilight Switch
Learn how twilight switches control lights automatically based on ambient light levels.
Automates outdoor lighting at dusk/dawn. Eliminates manual operation, reduces energy 20–40%, improves security, ensures consistent lighting cycles.
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Photocell relay includes potentiometer (adjustment screw). Rotate clockwise increases sensitivity (lights ON at lower light levels). Test at twilight to calibrate.
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No, well-calibrated photocells function reliably in cloud cover. Brief cloud passages don't trigger switching (hysteresis delay prevents). Extreme fog may delay activation slightly.
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